PLANTS RESPOND TO HORMONES PRACTICE TEST.
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A chemical substance that causes plants to increase the secretion of a
particular enzyme is…
A. PPO
B. Methyl jasmonate
C. Both A and B
D. Neither A nor B
The enzyme that is responsible to protect the leaves against attack of
parasites is called
A. PPO
B. Methyl jasmonate
C. Both A and B
D. Neither A nor B
Plant structure that is able to protect the plant against attack from herbivores
is/are…
A. Sticky secretion
B. Thorns
C. Both A and B
D. Neither A nor B
Auxin based selective herbicides…
A. Are made using auxins
B. Only kill weeds if they are used in the correct dosage
C. Both A and B
D. Neither A nor B
The advantage of auxin based herbicides is/are…
A. No need to weed
B. They are pet and children friendly
C. Reduces labour because there is no need to weed
D. All of the above
In roots a high concentration of auxins
A. Promotes growth
B. Inhibits growth
C. Both A and B
D. None of the above
Auxins are produced at the tip and then moves evenly upwards in the…
A. Stem
B. Leaves
C. Roots
D. All of the above
Auxins are produced at the tip and then moves evenly downwards in the…
A. Stem
B. Leaves
C. Roots
D. All of the above
In stems a high concentration of auxins…
A. Promotes growth
B. Inhibits growth
C. Both A and B
D. Neither A nor B
In roots a low concentration of auxins…
A. Promotes growth
B. Inhibits growth
C. Both A and B
D. Neither A nor B
When the stem grows towards the GRAVITY this is known as…
A. Positive geotropism
B. Negative geotropism
C. Positive phototropism
D. A and C
When the stem grows towards the sun this is known as…
A. Positive geotropism
B. Negative geotropism
C. Positive phototropism
D. A and C
Roots and stems grow evenly if there is…
A. An even distribution of auxins
B. An uneven distribution of auxins
C. An uneven distribution of gibberellins
D. None of the above
14.
Bending reactions in plants are called…
A. Plasticity
B. Tropism
C. Guttation
D. Transpiration
15.
Light from one side is called…
A. Bilateral light
B. Mono-lateral light
C. Unilateral light
D. Both B and C
16.
The plant growth substance that brings about elongation of the internodes and
increases fruit sizes is…
A. Auxins
B. Gibberellins
C. Abscisic acid
D. None of the above
Growth of the lateral braches is inhibited when…
A. Apical bud is removed
B. Axillary bud is removed
C. Apical bud stays intact
D. None of the above
Abscisic acid is responsible for…
A. Apical dominance and cell enlargement
B. Development of flowers and increase in fruit
size
C. Ageing of the leaves and closing of the stomata during drought.
D. Germination of seeds and flowering in some
plants
Gibberellins are responsible for…
A. Apical dominance and cell enlargement
B. Development of flowers and increase in fruit
size
C. Ageing of the leaves and closing of the stomata during drought.
D. Germination of seeds and ageing of leaves
Auxins are responsible for…
A. Apical dominance and cell enlargement
B. Development of flowers and increase in fruit
size
C. Ageing of the leaves and closing of the stomata during drought.
D. Germination of seeds and flowering in some
plants
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Answer sheet.
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2
3
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11
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20
Answer sheet.
1
B
2
A
3
C
4
C
5
D
6
B
7
C
8
A
9
A
10 A
11 A
12 C
13 A
14 B
15 C
16 B
17 C
18 C
19 B
20 A